845668857 has 8 divisors (see below), whose sum is σ = 1230063840. Its totient is φ = 512526560.

The previous prime is 845668849. The next prime is 845668861. The reversal of 845668857 is 758866548.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 845668857 - 2³ = 845668849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845668797 and 845668806.

It is not an unprimeable number, because it can be changed into a prime (845668847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12813132 + ... + 12813197.

It is an arithmetic number, because the mean of its divisors is an integer number (153757980).

Almost surely, 2^845668857 is an apocalyptic number.

It is an amenable number.

845668857 is a deficient number, since it is larger than the sum of its proper divisors (384394983).

845668857 is a wasteful number, since it uses less digits than its factorization.

845668857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25626343.

The product of its digits is 12902400, while the sum is 57.

The square root of 845668857 is about 29080.3861219207. The cubic root of 845668857 is about 945.6565734742.

The spelling of 845668857 in words is "eight hundred forty-five million, six hundred sixty-eight thousand, eight hundred fifty-seven".